Signoe to the caevee cotton



(N0 Model.)

P. s. STRONG.

SHOE HOLDING JAGK. 105232,128.' Patented July 31, 1883.

Ef 1 Y,

UNITED STATES PATENT OFFICE.

FREDERICK S. STRONG, OF EAST BRIDGEWA'IER, 4IIASSACHUSETTS, AS-

SIGNOR TO THE CARVER COTTON GIN COMPANY, OF S/AME PLACE.

SHOE-HOLDING JACK.

SPECIFICATION forming part of Letterslatent No. 282,128, dated July 31, 1883.

' I Application filed June 14, 18`83. (No model.)

To all whom it may concern:

Be it known that I, FREDERICK S. STRONG,

a citizen of the United States, residing at East Bridgewater, in the county of Plymouth and State of Massachusetts7 have invented certain new and useful Improvements in Shoe- Holding Jacks, of which the following is a specication. My invention relates to certain improvement-s in that class of swinging jacks which are used in shoe-sole-leveling machines, the object being to improve the several adjusting devices by which the jack is adapted to the size of the last and to the inclination of the hole that is bored in the last for receiving the heel-pin, so that the sole of the shoe may be presented to the action of the roller in a line as nearly as possible with the rectilinear motion of the roller. I attain these objects by the mechanism illustrated in the accompanying drawings, in which@ Figure 1 is an elevation of my improved jack. Fig. 2 is aplan of the same. Fig. 3 is a horizontal section taken on line y y), Fig. 1. Fig. 4 isa crossvertical section on line w x.

A A', Figs. 1 and 2, represent the frame of the leveling-machine. At the upper end of these parts A A', I pivot the swinging jackframe B B'. This j ack-frame has in its lower portion a curved housing, Bt, in which the jack-pillar C may slide in a curvilinear direction to a limited degree. curve for the curved housing B4, I use as a center a point at P, Fig. 1, which is very near the plane of the lower part of the last as the last sits upon the jack. This point I have found by experience gives a curve to the hous- Aing B4, which on an average is best adapted to all sizes of shoes, and it gives the least amount of tilting to the forward part of the last. Hence by using this point as a center I am enabled to jack all sizes and to maintain the level of the sole approximately in a horizontal plane, this being a great advantage in the practical working of the machine. The jackpillar C is fastened in its position in the housing B'i by means of the clamping-bolts D D'.

(See Figs. 1, 2, and 3.) The part C' of the jack-pillar is cylindrical, and has within it a vertical moving piston, C3, into which is inserted the heel-pin C4. The lower end of the piston C3 terminates in a screw, C5, Fig. 4. This screw C5 passes through a revolving nut,

In striking the E, Figs. 3 and 4, the nut E being held from any vertical movement, so that when 1t 1s revolved the piston Cl, and consequently the heel-pin C*,must move up and down, thus giving it the vertical adjustment I require. The outer surface of the nut E is a gear, E', as shown in Fig. 3, which meshes with the wormgear E2 on the shaft E, the whole being operated by the hand-wheel Et.

The toe-support-adj usting device consists of asliding piece, H, (see Figs. 1 and 2,) which slides horizontally, as shown in Fig. 1, and is held in any desired position by the clampingbolt H', which passes through a slot made in the part H, and indicated by dotted lines at H2, Fig. 1. In addition to the horizontal adjustment of the toe-support I have an inclined adjustment which is made as follows: The toesupport proper, K, is made forked shape, and is fitted to slide upon the upper inclined part of the sliding piece H. This support K can be moved back and forth to any desired position on the piece H, and there `held by the set-screw K'. To change the angle of the heelpin 0*, I slack the clamping-screws D D and slide the jack-pillar C and all its parts back or forth, as may be desirable, in the housing B4. In case I slide it to the left, the pin C4 will approach the perpendicular. the right, the pin will be more inclined. When the right position has been attained, the clampin g-bOlts D D' are screwed up.

I claim as my invention- 1. In a swinging jack, the combination of the heel-pin C4, piston C3, pillar-j ack C C', mounted upon a curved housing, B4, and screw C5, with the screw-nut E, and wormgear E E2, shaft E, and hand-wheel E4, all operating together substantially as described, and for the purpose set forth.

2. In a jack, the combination of the adjustable toe-support K, adapted to slide upon the inclined upper part of the sliding piece H, and sliding piece H, with the frame B B', said sliding piece H being adapted to move horizontally on the said jack-frame B B', and to be clamped in position by a screw, H', all operating together substantially as described, and for the purpose set forth.

FREDERICK S. STRONG.

Witnesses:

FRANK G. PARKER, CHAs. SPAULDTNG.

If I slide it to' IOO 

